I Love You Stinky Face, by Lisa McCourt. Illustrated by Cyd Moore.
This one really is for children – young children, but I find it moving in a light, silly way. It only has two or three hundred words, but asks the eternal question, “Would you still love me if……?” The format is a child asking its mother questions like, “But Mama, but Mama, what if I were an alligator with big, sharp teeth?” And Mama answers, “I’d buy you a bigger toothbrush.” You get the idea. It’s very cute, and a great reminder about the importance of unconditional love.